The normal is obviously a male but I would have like to have seen the position of the red feathers in the other bird. Shame you could not get a better picture of both the birds rumps. At 3 weeks it was bigger than its foster parents and they fed it brilliantly. I have even known of them hatching and raising for nearly 3 weeks an orphaned baby Alexandrine. Red Rumps are very good parents and will foster just about anything. The albino's at that stage were worth around $5000 Australian dollars. I know of a number of cockatiel breeders who used them as foster parents when the albino's cockatiels were first bred and they wanted to maximize the amount of babies they got. They are quite aggressive and protective of their nest, eggs and young. I would not be housing them with budgies and tiels, especially if you plan on breeding them in the same aviary. The one I am talking about is A Guide to Neophema and Psephotus Grass Parrots (Revised Edition). That link I gave you is not to Amazon or Ebay but directly to the Australian Birdkeeper site to the page that has the book. They are quite flighty and really difficult to capture on camera. I might just end up caving and giving them a box if they persist. I haven't given them a nest box but if I do see eggs, I don't think I will have it in me to throw them away. I am quite nervous as they haven't been conditioned to breed as of yet. I guess the sudden change in food and environment for the better when compared to the pet stores threw them into breeding mode. I have never witnessed any birds begin mating and bonding within a week of coming home. Yes I can see they are aggressive breeders.
![red rump parrot mutations red rump parrot mutations](http://www.gencalc.com/gal/ParRedR/ParRedR_14500.jpg)
As of now they are in quarantine in another room. If they don't get along, I can always keep them separately if needed. I hope they can be housed with my 8 budgies and 4 tiels in their aviary in the future with a proper introduction. That's why I try to pick up as much knowledge as possible online. I had to wait for 2 months to get my anti air-sac mite medication as well since it isn't available here.
![red rump parrot mutations red rump parrot mutations](https://i.ytimg.com/vi/EKS7b3pgIeo/maxresdefault.jpg)
I usually have to ask my family in the UK to order and bring stuff for me here when they visit. I live in Dubai so unfortunately I don't have access to sites like amazon or ebay since the local service providers have blocked them.